Cast
- Élodie Hiolle as Mademoiselle Jeanne (voice)
- Michel de Warzee as Aimé De Mesmaeker (voice)
- Laurent Pasquier as Joseph Boulier / Jeff / Bertrand Labevue / Le chat / La mouette / Les souris / Autres personnages secondaires (voice)
- Patrice Dozier as Léon Prunelle (voice)
- Frédéric Jannin as Monsieur Dupuis (voice)
- Micha Lescot as Gaston Lagaffe (voice)
- Bernard Alane as Yves Lebrac (voice)
- Jérôme Pauwels as Jules-de-chez-Smith-en-face / Joseph Longtarin (voice)